package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cglib.core.Local;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对

        //对前端提交过来的明文面膜进行加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }
    /**
     * 新增员工
     * @param employeeDTO
     * @return
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置账号的状态，默认正常状态1，表示正常，0，表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，默认密码是123456，但是密码输入进数据库中需要加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前记录的创建时间和修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录的创建人的id和修改人id
        //使用ThreadLocal 进行存储当前登录用户的id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //设置分页查询的参数,开始分页
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //进行分页查询
        Page<Employee> employeePage = employeeMapper.pageQuery(employeePageQueryDTO);
        //总的记录数
        long total = employeePage.getTotal();
        //员工的数据
        List<Employee> records = employeePage.getResult();

        return new PageResult(total,records);
    }
    /**
     * 员工账号启用，禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //使用builder构造对象
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.update(employee);
    }
    /**
     * 编辑员工信息
     * @param employee
     * @return
     */
    @Override
    public void update(Employee employee) {
        //修改updateTime,和updateUser这个两个参数
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        //进行编辑员工信息
        employeeMapper.update(employee);
    }

    /**
     * 编辑员工信息前的数据回显
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        return employee;
    }
    /**
     * 修改密码
     * @param passwordEditDTO
     * @return
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //先查询数据库中的密码
        String oldPassword = employeeMapper.getById(BaseContext.getCurrentId()).getPassword();
        //将前端传入的旧密码加密
        String frontOldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        //先校验旧密码对不对
        if(!oldPassword.equals(frontOldPassword)){
            throw new PasswordErrorException("The old password is incorrect");
        }
        //将新密码进行加密存入数据库中
        Employee employee = Employee.builder()
                .password(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()))
                //TODO 这边前端传过来的参数有问题，没有把empId传过来，只实现了改密码需要登录到自己的账号
                .id(BaseContext.getCurrentId())
                .build();
        employeeMapper.update(employee);
    }

}
